What causes sudden lack of power when stepping on the accelerator while driving?
2 Answers
Sudden lack of power when stepping on the accelerator while driving may be caused by issues in the fuel supply system or ignition system. When encountering this situation, owners need to have the fault inspected at a 4S shop or professional repair shop. The ignition system is crucial for the engine, with its main components being spark plugs and ignition coils. Spark plugs require regular replacement - prolonged use without replacement will cause the electrode gap to widen, affecting spark plug ignition. If spark plugs aren't replaced for extended periods, carbon deposits may form on the electrodes, which also affects ignition. Ignition coils may also malfunction after prolonged use, so owners should regularly check their working condition.
Last month, I went on a road trip and tried to overtake on the highway, but the car felt sluggish when I pressed the accelerator, as if it had lost its soul. It really scared me, so I pulled over immediately. Later, the mechanic found that the fuel filter was clogged—I hadn’t changed it in three years, and impurities had completely blocked the fuel line. The mechanic said this is the most common issue; the fuel pump works overtime but can’t deliver fuel, leaving the engine starved and powerless. Another time, my friend’s car had aging spark plugs that crackled like firecrackers during ignition, causing incomplete combustion in the cylinders and naturally lacking power. If you smell gasoline, be careful—it could mean a fuel line leak, like a marathon runner gasping for air.
